Baby stroller frame assembly and baby stroller

Abstract

The present disclosure relates to a baby carriage frame assembly and a baby carriage, wherein the frame assembly comprises: a front foot group, a seat frame group and a rear foot group, the front foot group comprises a front foot rod and a front foot joint, the first end of the front foot joint is fixed to the first end of the front foot rod; the seat frame group comprises: a seat part, on which a locking and unlocking component is provided, which is used to allow the frame assembly to be folded after unlocking, and the seat part is hinged to the second end of the front foot joint to form a third hinge axis; the rear foot group comprises: a rear foot rod, a first end of which is hinged to the first end of the foot joint to form a first hinge axis; a rear wheel assembly rotatably connected to the second end of the rear foot rod; a linkage rod, a first end of which is hinged to the side of the seat part along the left and right directions to form a second hinge axis, and the second hinge axis is located on a side of the locking and unlocking component away from the first hinge axis; the linkage rod is used to move upward to unlock the rear wheel assembly when the frame assembly is folded; a rear wheel driving mechanism is provided on the rear foot rod, and is used to move after the rear wheel assembly is unlocked, so as to drive the rear wheel assembly to swing and retract.

Description

Technical Field

[0001] The present disclosure relates to the technical field of children's products, and in particular to a baby stroller frame assembly and a baby stroller. Background Art

[0002] In order to facilitate carrying or storage, the current baby stroller sometimes needs to fold the frame. In order to achieve these two functions, the current frame folding mechanism is relatively complex and requires complex operating steps when folding, which makes the operation difficult and less convenient. Summary of the invention

[0003] The embodiments of the present disclosure provide a baby stroller frame assembly and a baby stroller, which can more conveniently realize the folding of the rear wheel assembly.

[0004] In one aspect, an embodiment of the present disclosure provides a baby stroller frame assembly, comprising: a front foot group, a seat frame group and a rear foot group, wherein the front foot group comprises a front foot rod and a front foot joint, wherein the first end of the front foot joint is fixed to the first end of the front foot rod; the seat frame group comprises: a seat portion, wherein a locking and unlocking component is provided on the seat portion, and is configured to allow the frame assembly to be folded after being unlocked, wherein the seat portion is hinged to the second end of the front foot joint to form a third hinge axis; and the rear foot group comprises:

[0005] A rear foot rod, a first end of the rear foot rod being hinged to a first end of the foot joint to form a first hinge axis;

[0006] a rear wheel assembly rotatably connected to the second end of the rear foot rod;

[0007] A linkage rod, a first end of which is hinged to a side portion of the seat portion in the left-right direction to form a second hinge axis, and in the front-rear direction, the second hinge axis is located on a side of the locking and unlocking component away from the first hinge axis; the linkage rod is configured to move upward to unlock the rear wheel assembly when the frame assembly is folded; and

[0008] The rear wheel drive mechanism is arranged on the rear foot rod and is configured to move after the rear wheel assembly is unlocked to drive the rear wheel assembly to swing and retract.

[0009] In some embodiments, the rear wheel assembly includes a rear wheel that is configured to be retracted inwardly to a vertical position with the axis thereof when the frame assembly is in a fully folded state.

[0010] In some embodiments, the linkage rod is located on the inner side of the rear foot rod in the left-right direction, and is configured to move downward to push the rear wheel assembly outward during the unfolding of the frame assembly, and lock the rear wheel assembly when it moves downward to contact at least a portion of the inner side surface of the rear wheel assembly.

[0011] In some embodiments, a rounded corner is provided on a side of the second end of the linkage rod close to the rear foot rod.

[0012] In some embodiments, the rear foot group also includes: a rear foot rod joint, the first end of the rear foot rod joint is connected to the second end of the rear foot rod, the second end of the rear foot rod joint is hinged to the rear wheel assembly, and the rear wheel assembly is configured to retract to a contact limit position with the rear foot rod joint and the second end of the linkage rod.

[0013] In some embodiments, a guide seat is provided on the rear foot rod, and the rear wheel drive mechanism is configured to move under the guidance of the guide seat.

[0014] In some embodiments, a guide hole is provided on the guide seat, the linkage rod passes through the guide hole, and is movably arranged relative to the guide hole.

[0015] In some embodiments, the guide seat is provided with a guide groove extending along the length direction of the rear foot rod, and the side wall of the guide groove has an opening extending along the length direction thereof, and the rear wheel drive mechanism includes:

[0016] A guide member, movably disposed in the guide groove;

[0017] an elastic element, disposed between the guide member and an end wall at the bottom of the guide groove, configured to drive the guide member to move upward after the rear wheel assembly is unlocked; and

[0018] A connecting rod, wherein the first end of the connecting rod is fixed to the guide member at the opening, and the second end of the connecting rod is hinged to the rear wheel assembly, and is configured to drive the rear wheel assembly to swing and retract when moving upward with the guide member.

[0019] In some embodiments, the guide groove is opened from the top of the guide seat, the side wall of the guide groove is an arc surface and the circumferential length exceeds half of the circumference, and the guide member includes:

[0020] A first cylindrical portion fixed to the first end of the connecting rod through the opening; and

[0021] The second cylindrical portion is coaxially connected to the first cylindrical portion and has a smaller diameter than the first cylindrical portion;

[0022] The elastic element is sleeved on the second cylindrical portion and abuts against the end surface where the first cylindrical portion and the second cylindrical portion are connected.

[0023] In some embodiments, the rear foot assembly further comprises a rear foot rod joint, a first end of the rear foot rod joint being connected to a second end of the rear foot rod; and the rear wheel assembly comprises:

[0024] rear wheels; and

[0025] The connecting piece is fixed on the rear wheel, and the second end of the connecting piece and the rear foot rod joint are hinged to form a fifth hinge axis, and the connecting piece and the second end of the connecting rod are hinged to form a sixth hinge axis. The fifth hinge axis and the sixth hinge axis are arranged at intervals and both extend in the front-rear direction.

[0026] In some embodiments, the rear foot group also includes a cross bar, and a rear foot bar is respectively arranged on the left and right sides of the frame assembly, each rear foot bar is provided with a guide seat, and the two ends of the cross bar are respectively connected to the guide seats on both sides.

[0027] In some embodiments, the guide seat includes:

[0028] A connecting rod, a first end of which is connected to the crossbar;

[0029] A first guide portion connected to the second end of the connecting rod, and the first guide portion is located on the inner side of the rear foot rod in the left-right direction, and the first guide portion is provided with a guide hole for the linkage rod to pass through, and the guide hole is configured to provide guidance for the movement of the linkage rod; and

[0030] The second guide part is connected to an end of the first guide part away from the connecting rod and extends upward along the length direction of the rear foot rod. The second guide part is provided with a guide groove from the top along the length direction of the rear foot rod and is configured to provide guidance for the movement of the rear wheel drive mechanism.

[0031] Another aspect of the embodiments of the present disclosure provides a baby stroller, comprising the baby stroller frame assembly of the above-mentioned embodiment.

[0032] The baby stroller frame assembly of the disclosed embodiment can lock the rear wheel assembly by arranging a linkage rod, thereby ensuring that the rear wheel assembly is stably in a fixed position after the frame assembly is unfolded, ensuring the straightness of the baby stroller when in use, thereby improving the operability of the user when pushing the stroller and the comfort of the baby sitting; moreover, it can also ensure that the rear wheel assembly can withstand external force impact from the side during use, thereby preventing the rear wheel assembly from being damaged, thereby improving the stability of the entire baby stroller; in addition, during the folding process of the frame assembly, the linkage rod can unlock the rear wheel assembly, and the movement of the rear wheel drive mechanism can drive the rear wheel assembly to swing and retract, thereby reducing the space occupied by the rear wheel assembly after the frame assembly is folded, thereby improving portability and facilitating storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0034] Figure 1 It is a schematic structural diagram of some embodiments of the baby stroller frame assembly disclosed in the present invention;

[0035] Figure 2 Exploded views of some embodiments of the stroller frame assembly of the present invention;

[0036] Figure 3 It is a schematic structural diagram of a rear foot assembly and a handlebar assembly in the baby stroller frame assembly disclosed in the present invention;

[0037] Figure 4 for Figure 3 A partial enlarged view of the bottom of the middle and rear foot rod group;

[0038] Figure 5 for Figure 3 Exploded view of the mid-hindfoot group;

[0039] Figure 6 It is a structural diagram of the guide seat in the rear foot group from the first perspective;

[0040] Figure 7 It is a structural diagram of the guide seat in the rear foot group from a second perspective;

[0041] Figure 8 A rear view of the rear wheel assembly locked when the frame assembly is unfolded;

[0042] Fig. 9 It is a three-dimensional diagram of the rear wheel assembly being locked when the frame assembly is unfolded;

[0043] Fig.10 for Fig. 9 The enlarged view of P in the figure;

[0044] Fig.11 A three-dimensional view showing the rear wheel assembly unlocked and the frame assembly folded;

[0045] Fig.12 for Fig.11 Enlarged view of Q in .

[0046] Description of Reference Numerals

[0047] A100, front foot group; A200, seat frame group; A300, handlebar group; A400, rear foot group;

[0048] A, first articulation axis; B, second articulation axis; C, third articulation axis; D, fourth articulation axis; M, fifth articulation axis; N, sixth articulation axis; S, rear foot rod joint surface;

[0049] 101, front wheel assembly; 102, front foot bar; 103, pedal bar; 104, front foot joint;

[0050] 200, locking and unlocking components; 220, seat portion;

[0051] 301, handle joint;

[0052] 401, rear foot rod; 402, guide seat; 21, connecting rod; 22, first guide part; 23, second guide part; 22A, guide hole; 23A, guide groove; 23B, opening; 403, cross bar; 404, rear foot rod joint; 405, side armrest joint; 410, rear wheel assembly; 411, rear wheel; 412, connecting piece; 420, rear wheel drive mechanism; 421, connecting rod; 422, guide piece; 422A, first cylindrical part; 422B, second cylindrical part; 423, elastic element; 424, screw; 430, linkage rod; 431, plug; 432, fillet. DETAILED DESCRIPTION

[0053] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects, unless explicitly stated not to be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0054] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0055] In the description of the present disclosure, it is necessary to understand that the terms "front", "back", "top", "bottom", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. For example, they are defined based on the direction in which a baby sits in a stroller. These are only for the convenience of describing the present disclosure and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present disclosure.

[0056] The present disclosure provides a baby stroller, which includes a baby stroller frame assembly (hereinafter referred to as "frame assembly") and a seat assembly. The frame assembly is configured to support the seat assembly, and the frame assembly enables the baby stroller to move when an external force is applied. The seat assembly can be integrally mounted on the frame assembly for an infant or child to sit on, for example, in a detachable manner.

[0057] like Figure 1 As shown, the present disclosure provides a baby stroller frame assembly, which in some embodiments includes: a front leg group A100, a seat frame group A200, a handlebar group A300 and a rear leg group A400.

[0058] like Figure 2As shown, the front foot group A100 includes a front foot rod 102, a pedal rod 103 and a front foot joint 104. The front foot rod 102 and the pedal rod 103 can both be U-shaped. Two front foot joints 104 can be provided, which are respectively fixed to the first ends of the left and right sides of the U-shaped front foot rod 102 and extend rearward. Front wheel assemblies 101 are respectively provided at the left and right ends of the bottom of the front foot rod 102 along the frame assembly.

[0059] The seat frame assembly A200 includes a seat portion 220, a linkage rod 430, and a locking and unlocking component 200. The seat portion 220 is hinged to the second end of the forefoot joint 104 to form a third hinge axis C; the locking and unlocking component 200 is unlocked with the third hinge axis C as the rotation center, and is configured to achieve locking and unlocking of the frame assembly; the first end of the linkage rod 430 is hinged to the side of the seat portion 220 along the left and right direction to form a second hinge axis B.

[0060] The handle assembly A300 is hinged to the seat portion 220 at the side along the left-right direction to form a fifth hinge axis D.

[0061] The rear foot assembly A400 includes a rear foot rod 401 and a side armrest joint 405, wherein the first end of the side armrest joint 405 is fixed to the first end of the rear foot rod 401 and extends backward, and the first end of the side armrest joint 405 is hinged to the first end of the front foot joint 104, so as to realize the hinge connection between the first end of the rear foot rod 401 and the first end of the front foot joint 104, forming a first hinge axis A. The second end of the rear foot rod 401 is connected to the rear wheel assembly 410. The second end of the side armrest joint 405 is hinged to the handlebar joint 301 of the handlebar assembly A300, forming a fourth hinge axis D.

[0062] Among them, in the front-to-rear direction of the frame assembly, the first hinge axis A, the third hinge axis C, the second hinge axis B and the fourth hinge axis D are arranged in sequence from front to rear, and each hinge axis extends in the left-right direction.

[0063] When the seat frame assembly A200 is unlocked by locking and unlocking the component 200, the front foot assembly A100 is folded by pushing the front foot joint 104 to rotate around the first hinge axis A through the third hinge axis C; at the same time, the seat frame assembly A200 drives the linkage rod 430 to rotate around the second hinge axis B and move upward, and the rear wheel assembly 410 is unlocked to fold the rear wheel assembly 410; at the same time, the seat frame assembly A200 drives the handlebar assembly A300 to fold.

[0064] In some embodiments, the frame assembly includes: a front foot group A100, a seat frame group A200 and a rear foot group A400, the front foot group A100 includes a front foot rod 102 and a front foot joint 104, the first end of the front foot joint 104 is fixed to the first end of the front foot rod 102; the seat frame group A200 includes: a seat portion 220, a locking and unlocking component 200 is provided on the seat portion 220, and is configured to allow the frame assembly to be folded after unlocking, the seat portion 220 is hinged to the second end of the forefoot joint 104, and forms a third hinge axis C; the rear foot group A400 includes: a rear foot rod 401, a rear wheel assembly 410, a linkage rod 430 and a rear wheel drive mechanism 420.

[0065] The first end of the rear foot rod 401 is hinged with the seat part 220 and the first end of the front foot joint 104 along the left-right direction to form a first hinge axis A. A rear foot rod 401 is provided on each of the left and right sides of the frame assembly. The rear wheel assembly 410 is rotatably connected to the second end of the rear foot rod 401. The first end of the linkage rod 430 is hinged with the side of the seat part 220 along the left-right direction to form a second hinge axis B. In the front-back direction, the second hinge axis B is located on the side of the locking and unlocking component 200 away from the first hinge axis A. The linkage rod 430 is configured to support the rear wheel assembly 410 through the second end of the linkage rod 430 when the frame assembly is in the unfolded state, so as to provide a locking force for the rear wheel assembly 410; and move upward to unlock the rear wheel assembly 410 when the frame assembly is folded. The rear wheel drive mechanism 420 is configured to move after the rear wheel assembly 410 is unlocked, so as to drive the rear wheel assembly 410 to swing back.

[0066] Since the second hinge axis B is located on the side of the locking and unlocking component 200 away from the first hinge axis A, when the locking and unlocking component 200 is unlocked by external force and pulled upward to fold the vehicle, the rear end of the seat portion 220 rotates upward with the first hinge axis A as the rotation axis, so that the linkage rod 430 moves upward to unlock the rear wheel assembly 410.

[0067] This embodiment locks the rear wheel assembly 410 by setting a linkage rod 430, which can ensure that the rear wheel assembly 410 can be stably in a fixed position after the frame assembly is unfolded, thereby ensuring the straightness of the baby carriage when in use, improving the operability of the user when pushing the stroller and the comfort of the baby sitting, and also improving the safety of the baby carriage when driving. Moreover, it can also ensure that the rear wheel assembly 410 can withstand external force impact from the side during use, preventing the rear wheel assembly 410 from being damaged, thereby improving the stability of the entire baby carriage. In addition, during the folding process of the frame assembly, the linkage rod 430 can unlock the rear wheel assembly 410, and the movement of the rear wheel drive mechanism 420 can drive the rear wheel assembly 410 to swing back, reducing the space occupied by the rear wheel assembly 410 frame after folding, thereby improving portability and facilitating storage.

[0068] In some embodiments, Fig.11 As shown, the rear wheel assembly 410 includes a rear wheel 411, and the rear wheel 411 is configured to be retracted inwardly until the axis is in a vertical state when the frame assembly is in a fully folded state. Here, "retracted inwardly" means retracted inwardly along the left and right directions, and the "vertical state" is not a vertical position in a strict sense, but can be within a preset angle range including the vertical state.

[0069] In this embodiment, the rear wheel assembly 410 can be retracted to the inner side of each rod of the frame assembly after the frame assembly is folded in the left-right direction and the up-down direction, which can greatly reduce the extra space occupied by the rear wheel assembly 410 after the frame assembly is folded, thereby reducing the volume of the frame assembly, thereby improving portability and facilitating storage.

[0070] In some embodiments, Figure 8 and Fig. 9 As shown, the linkage rod 430 is located on the inner side of the rear foot rod 401 along the left-right direction, and is configured to push the rear wheel assembly 410 outward by moving the linkage rod 430 downward during the unfolding of the frame assembly, for example, the rear wheel assembly 410 is pushed outward by the second end (bottom end) of the linkage rod 430, and the rear wheel assembly 410 is locked when it moves downward to contact at least a portion of the inner side surface of the rear wheel assembly 410.

[0071] from Figure 8 It can be seen that the rear wheel assembly 410 includes a rear wheel 411 and a connecting member 412, wherein the connecting member 412 is disposed on the rear wheel 411 so that the rear wheel 411 is connected to the rear foot rod 401 through the connecting member 412. During the downward movement of the linkage rod 430, the rear wheel assembly 410 is pushed outward through the second end (bottom end) of the linkage rod 430. After the linkage rod 430 moves downward to the outer side surface along the left-right direction and contacts the connecting member 412, it cannot move downward further, and the rear wheel assembly 410 is locked.

[0072] This embodiment can gradually push the rear wheel assembly 410 from the retracted position back to the initial position through the linkage rod 430 during the unfolding of the frame assembly, so that the rear wheel assembly 410 can be smoothly opened. After the frame assembly is fully unfolded, the rear wheel assembly 410 is reliably locked in the initial position due to the contact limit between the linkage rod 430 and the rear wheel assembly 410, which can improve the straightness of the baby carriage when driving, improve the operability of the user when pushing the stroller and the comfort of the baby riding, and also improve the safety of the baby carriage when driving. Moreover, it can also ensure that the rear wheel assembly 410 can withstand the external force impact on the side during use, prevent the rear wheel assembly 410 from being damaged, and thus improve the stability of the entire baby carriage.

[0073] like Figure 8As shown, a rounded corner 432 is provided on the side of the second end of the linkage rod 430 close to the rear foot rod 401. For example, the linkage rod 430 is a tubular structure, a plug 431 is provided on the second end of the linkage rod 430, and a rounded corner 432 is provided on the side of the bottom end of the plug 431 close to the rear foot rod 401. By providing the rounded corner 432, when the rear wheel 411 is about to be deployed outward to the initial position, the second end of the linkage rod 430 can move smoothly along the inner side wall of the rear wheel assembly 410, thereby preventing the rear wheel assembly 410 from being scratched.

[0074] In some embodiments, Figure 5 As shown, the frame assembly further includes: a rear foot rod joint 404, a first end of the rear foot rod joint 404 is connected to the second end of the rear foot rod 401, and the second end of the rear foot rod joint 404 is hinged to the rear wheel assembly 410, and the rear wheel assembly 410 is configured to be retracted to a limit position contacting the rear foot rod joint 404 and the second end of the linkage rod 430. This embodiment can limit the position where the rear wheel assembly 410 is retracted.

[0075] For example, Figure 5 As shown, the rear foot rod 401 is a tubular structure, the first end of the rear foot rod joint 404 is inserted into the second end of the rear foot rod 401, the second end of the rear foot rod joint 404 is exposed from the rear foot rod 401, and is hinged to the connecting piece 412 of the rear wheel assembly 410. When the frame assembly is completely folded, the connecting piece 412 of the rear wheel assembly 410 is contacted and limited with the second end of the linkage rod 430. Moreover, the rear foot rod joint 404 includes a main body and a hinge joint connected to the bottom end of the main body, the hinge joint includes two relatively spaced discs, the top end of the connecting piece 412 is located between the two discs and is hinged to the hinge joint, and when the rear wheel 411 is retracted to a state where the axis is vertical, the side surface of the connecting piece 412 is simultaneously in contact with the bottom surface of the main body, i.e., the rear foot rod joint surface S.

[0076] In some embodiments, Figure 3 , Figure 4 and Fig.10 As shown, a guide seat 402 is provided on the rear foot rod 401, and the rear wheel drive mechanism 420 is configured to be installed on the rear foot rod 401 through the guide seat 402, and moves under the guidance of the guide seat 402. This embodiment can facilitate the installation of the rear wheel drive mechanism 420 and provide guidance for its movement, so that the folding process of the rear wheel assembly 410 during the folding process of the frame assembly is smoother.

[0077] In some embodiments, Figure 6 and Fig. 9 As shown, the guide seat 402 is provided with a guide hole 22A, and the linkage rod 430 passes through the guide hole 22A and is movably arranged relative to the axial direction of the guide hole 22A. For example, the linkage rod 430 adopts a tubular structure with an oblong cross section, and accordingly, the guide hole 22A is also designed as an oblong hole.

[0078] This embodiment can provide guidance for the up and down movement of the linkage rod 430, making the movement of the linkage rod 430 more stable and preventing the linkage rod 430 from deviating during the folding or unfolding of the frame, so as to accurately and reliably achieve the locking and unlocking of the rear wheel assembly 410.

[0079] In some embodiments, Figure 7 and Fig.10 As shown, the guide seat 402 is provided with a guide groove 23A extending along the length direction of the rear foot rod 401, and the side wall of the guide groove 23A has an opening 23B extending along its length direction. The rear wheel driving mechanism 420 includes: a guide member 422, an elastic element 423 and a connecting rod 421. The guide member 422 is movably arranged in the guide groove 23A; the elastic element 423, such as a spring, is arranged between the guide member 422 and the end wall at the bottom of the guide groove 23A, and is configured to drive the guide member 422 to move upward after the rear wheel assembly 410 is unlocked; the first end of the connecting rod 421 is fixed to the guide member 422 at the opening 23B, and the second end of the connecting rod 421 is hinged to the rear wheel assembly 410, and is configured to drive the rear wheel assembly 410 to swing back when the guide member 422 moves upward.

[0080] like Fig.10 As shown, when the frame assembly is in a fully unfolded state, the rear wheel assembly 410 is in a fully opened state, the linkage rod 430 locks the rear wheel assembly 410, and the rear wheel assembly 410 drives the connecting rod 421 to move downward, thereby driving the guide member 422 to move downward to put the elastic element 423 in a compressed state. Fig.12 As shown, when the frame assembly is folded, the linkage rod 430 is driven to move upward to unlock the rear wheel assembly 410, and the guide member 422 moves upward in the guide groove 23A under the elastic action of the elastic element 423, thereby driving the connecting rod 421 to move upward, so as to drive the rear wheel assembly 410 to be retracted through the connecting rod 421.

[0081] This embodiment provides driving force for retracting the rear wheel assembly 410 through the elastic action of the elastic element 423, without the need for additional driving components, can conform to the structure of the frame assembly, and has reliable operation.

[0082] like Fig.10As shown, the guide groove 23A is opened from the top of the guide seat 402, and the side wall of the guide groove 23A is an arc surface and the circumferential length exceeds half of the circumference, which prevents the guide member 422 from escaping from the opening 23B. The guide member 422 includes: a first cylindrical portion 422A, which is fixed to the first end of the connecting rod 421 through the opening 23B; and a second cylindrical portion, which is coaxially connected to the first cylindrical portion 422A and has a smaller diameter than the first cylindrical portion 422A. Among them, the elastic element 423 is sleeved on the second cylindrical portion, and the first end of the elastic element 423 abuts against the end surface where the first cylindrical portion 422A and the second cylindrical portion are connected, and the second end of the elastic element 423 abuts against the bottom surface of the guide groove 23A.

[0083] This embodiment is conducive to fixing the connecting rod 421 and the guide member 422, and is also convenient for installing the elastic element 423, which can simplify the structure.

[0084] In some embodiments, Figure 5 As shown, the frame assembly further includes a rear foot rod joint 404, and the first end of the rear foot rod joint 404 is connected to the second end of the rear foot rod 401. The rear wheel assembly 410 includes: a rear wheel 411 and a connecting member 412, the connecting member 412 is fixed to the rear wheel 411, the connecting member 412 is hinged with the second end of the rear foot rod joint 404 to form a fifth hinge axis M, the connecting member 412 is hinged with the second end of the connecting rod 421 to form a sixth hinge axis N, the fifth hinge axis M and the sixth hinge axis N are spaced apart and located at the inner area of ​​the top of the rear wheel 411, and both extend in the front-to-back direction.

[0085] The guide member 422 and the elastic element 423 are installed in the guide groove 23A of the guide seat 402, and one of the screw rods 424 passes through the top of the connecting rod 421 and is fixed to the guide member 422 through the opening 23B. At the sixth hinge axis N, another screw rod 424 passes through the bottom of the connecting rod 421 and is fixed to the connecting member 412.

[0086] This embodiment uses the staggered fifth hinge axis M and the sixth hinge axis N to drive the rear wheel assembly 410 to retract with the fifth hinge axis M as the rotation axis when the connecting rod 421 moves upward, and the structure is simple and reliable.

[0087] In some embodiments, Figure 3 As shown, the frame assembly further includes a cross bar 403, and a rear foot rod 401 is respectively arranged on the left and right sides of the frame assembly, and each rear foot rod 401 is provided with a guide seat 402, and the two ends of the cross bar 403 are respectively connected to the guide seats 402 on both sides. The rear foot rods 401 on both sides are connected by the cross bar 403 to form a rear foot group A400 with a stable structure, and it is also easy to position the guide seat 402.

[0088] In some embodiments, Figure 4As shown, the guide seat 402 includes: a connecting rod 21, a first guide portion 22 and a second guide portion 23. The first end of the connecting rod 21 is connected to the cross bar 403, for example, the cross bar 403 is a sleeve, and the cross bar 403 is sleeved outside the connecting rod 21; the first guide portion 22 is connected to the second end of the connecting rod 21, and the first guide portion 22 is located on the inner side of the rear foot rod 401 along the left and right direction, and the first guide portion 22 is provided with a guide hole 22A for the linkage rod 430 to pass through, and the guide hole 22A is configured to provide guidance for the movement of the linkage rod 430; the second guide portion 23 is connected to an end of the first guide portion 22 away from the connecting rod 21 and extends upward along the length direction of the rear foot rod 401, and the second guide portion 23 is provided with a guide groove 23A from the top along the length direction of the rear foot rod 401, and is configured to provide guidance for the movement of the rear wheel drive mechanism 420.

[0089] The guide seat 402 of this embodiment can provide guidance for the movement of the linkage rod 430 and the movement of the rear wheel drive mechanism 420 at the same time, and is connected to the cross bar 403, integrating multiple structures to make the structure more compact.

[0090] Secondly, the present disclosure provides a baby stroller, comprising the baby stroller frame assembly of the above embodiment. This baby stroller has at least one of the following advantages:

[0091] 1. It can ensure that after the frame assembly is unfolded, the rear wheel assembly 410 is stably in a fixed position, thereby ensuring the straightness of the baby carriage when it is traveling, thereby improving the operability of the user when pushing the stroller and the comfort of the baby riding, and also improving the safety of the baby carriage when it is traveling.

[0092] 2. It can ensure that the rear wheel assembly 410 can withstand external force impact from the side during use, preventing the rear wheel assembly 410 from being damaged, thereby improving the stability of the entire baby stroller.

[0093] 3. During the folding process of the frame assembly, the rear wheel assembly 410 can be driven to swing and retract, thereby reducing the space occupied by the rear wheel assembly 410 after the frame is folded, thereby improving portability and facilitating storage.

[0094] 4. The parts are easy to disassemble and maintain, which can reduce the difficulty of manufacturing the stroller and is easy to maintain during use.

[0095] The above is a detailed introduction to a baby stroller frame assembly and a baby stroller provided by the present disclosure. Specific embodiments are used herein to illustrate the principles and implementation methods of the present disclosure, and the description of the above embodiments is only used to help understand the method and core idea of ​​the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. A baby stroller frame assembly, characterized in that: include: A front foot group (A100), a seat frame group (A200) and a rear foot group (A400), wherein the front foot group (A100) comprises a front foot rod (102) and a front foot joint (104), wherein a first end of the front foot joint (104) is fixed to a first end of the front foot rod (102); the seat frame group (A200) comprises a seat portion (220), wherein a locking and unlocking component (200) is provided on the seat portion (220) and is configured to allow the frame assembly to be folded after being unlocked, wherein the seat portion (220) is hinged to the second end of the front foot joint (104) to form a third hinge axis (C); and the rear foot group (A400) comprises: A rear foot rod (401), wherein a first end of the rear foot rod (401) is hinged to a first end of the front foot joint (104) to form a first hinge axis (A); A rear wheel assembly (410) rotatably connected to the second end of the rear foot rod (401); a linkage rod (430), wherein a first end of the linkage rod (430) is hinged to a side portion of the seat portion (220) in the left-right direction to form a second hinge axis (B); in the front-rear direction, the second hinge axis (B) is located on a side of the locking and unlocking component (200) away from the first hinge axis (A); the linkage rod (430) is configured to move upward to unlock the rear wheel assembly (410) when the frame assembly is folded; and A rear wheel drive mechanism (420) is disposed on the rear foot rod (401) and is configured to move after the rear wheel assembly (410) is unlocked, so as to drive the rear wheel assembly (410) to swing and retract; The rear foot rod (401) is provided with a guide seat (402), and the rear wheel drive mechanism (420) is configured to move under the guidance of the guide seat (402); the guide seat (402) is provided with a guide hole (22A), and the linkage rod (430) passes through the guide hole (22A) and is movably arranged relative to the guide hole (22A); the guide seat (402) is provided with a guide groove (23A) extending along the length direction of the rear foot rod (401), and the side wall of the guide groove (23A) has an opening (23B) extending along its own length direction. The rear wheel drive mechanism (420) comprises: A guide member (422) movably disposed in the guide groove (23A); an elastic element (423), disposed between the guide member (422) and an end wall at the bottom of the guide groove (23A), and configured to drive the guide member (422) to move upward after the rear wheel assembly (410) is unlocked; and A connecting rod (421), wherein a first end of the connecting rod (421) is fixed to the guide member (422) at the opening (23B), and a second end of the connecting rod (421) is hinged to the rear wheel assembly (410), and is configured to drive the rear wheel assembly (410) to swing and retract when moving upward with the guide member (422).

2. The baby carriage frame assembly according to claim 1, characterized in that: The rear wheel assembly (410) comprises a rear wheel (411), and the rear wheel (411) is configured to be retracted inwardly until the axis is in a vertical state when the frame assembly is in a fully folded state.

3. The baby carriage frame assembly according to claim 2, characterized in that: The linkage rod (430) is located inside the rear foot rod (401) in the left-right direction, and is configured to move downward to push the rear wheel assembly (410) outward during the unfolding process of the frame assembly, and to lock the rear wheel assembly (410) when it moves downward to contact at least part of the inner side surface of the rear wheel assembly (410).

4. The baby carriage frame assembly according to claim 3, characterized in that: A rounded corner (432) is provided on a side of the second end of the linkage rod (430) close to the rear foot rod (401).

5. The baby stroller frame assembly according to claim 1, characterized in that: The rear foot assembly (A400) further comprises: a rear foot rod joint (404), the first end of the rear foot rod joint (404) being connected to the second end of the rear foot rod (401), the second end of the rear foot rod joint (404) being hinged to the rear wheel assembly (410), and the rear wheel assembly (410) being configured to be retracted to a contact limit position with the rear foot rod joint (404) and the second end of the linkage rod (430).

6. The baby stroller frame assembly according to claim 1, characterized in that: The guide groove (23A) is opened from the top of the guide seat (402), the side wall of the guide groove (23A) is an arc surface and the circumferential length exceeds half of the circumference, and the guide member (422) comprises: A first cylindrical portion (422A) is fixed to the first end of the connecting rod (421) through the opening (23B); and A second cylindrical portion, coaxially connected to the first cylindrical portion (422A) and having a smaller diameter than the first cylindrical portion (422A); Wherein, the elastic element (423) is sleeved on the second cylindrical portion and abuts against the end surface where the first cylindrical portion (422A) is connected to the second cylindrical portion.

7. The baby stroller frame assembly according to claim 1, characterized in that: The rear foot assembly (A400) further comprises a rear foot rod joint (404), wherein a first end of the rear foot rod joint (404) is connected to a second end of the rear foot rod (401); the rear wheel assembly (410) comprises: rear wheel (411); and A connecting member (412) is fixed on the rear wheel (411); the connecting member (412) is hinged with the second end of the rear foot rod joint (404) to form a fifth hinge axis (M); the connecting member (412) is hinged with the second end of the connecting rod (421) to form a sixth hinge axis (N); the fifth hinge axis (M) and the sixth hinge axis (N) are spaced apart and both extend in the front-rear direction.

8. The baby stroller frame assembly according to claim 1, characterized in that: The rear foot assembly (A400) further comprises a cross bar (403), one rear foot bar (401) is respectively arranged on the left and right sides of the frame assembly, each rear foot bar (401) is provided with a guide seat (402), and both ends of the cross bar (403) are respectively connected to the guide seats (402) on both sides.

9. The baby carriage frame assembly according to claim 8, characterized in that: The guide seat (402) comprises: A connecting rod (21), wherein a first end of the connecting rod (21) is connected to the cross rod (403); a first guide portion (22) connected to the second end of the connecting rod (21), and the first guide portion (22) is located on the inner side of the rear foot rod (401) in the left-right direction, and the first guide portion (22) is provided with a guide hole (22A) for the linkage rod (430) to pass through, and the guide hole (22A) is configured to provide guidance for the movement of the linkage rod (430); and The second guide portion (23) is connected to an end of the first guide portion (22) away from the connecting rod (21) and extends upward along the length direction of the rear foot rod (401). The second guide portion (23) is provided with a guide groove (23A) from the top along the length direction of the rear foot rod (401) and is configured to provide guidance for the movement of the rear wheel drive mechanism (420).

10. A baby stroller, characterized in that: The invention comprises a baby carriage frame assembly as described in any one of claims 1 to 9.

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